本文選題：鐵尾礦砂　切入點：混凝土　出處：《河北聯(lián)合大學》2014年碩士論文　論文類型：學位論文

【摘要】：鐵尾礦砂在混凝土中的應用，既能解決鐵尾礦砂堆存對環(huán)境污染和占用大量土地的問題，又能解決建筑用砂資源日益短缺的突出矛盾。 目前，國內外對鐵尾礦砂混凝土的試驗研究主題集中在其力學性能上，而對抗?jié)B性能的研究很少，這對鐵尾礦砂在水工混凝土以及地下結構混凝土中的應用是一個嚴重的制約，，所以進行鐵尾礦砂混凝土抗?jié)B性能試驗研究是非常必要的。課題以鐵尾礦砂代替天然砂與普通碎石配制的混凝土為研究對象，采用逐級加壓法以及滲透系數(shù)法等試驗方法，通過采用正交理論進行試驗設計，對鐵尾礦砂混凝土的抗?jié)B性能進行了試驗研究，并利用極差分析、方差分析以及回歸分析等方法對試驗結果進行了分析處理。 試驗的結果分析表明，水膠比是影響鐵尾礦砂混凝土抗?jié)B性能的最主要的因素，粉煤灰摻量次之，鐵尾礦砂取代率對抗?jié)B性能的影響次于粉煤灰摻量，而砂率對抗?jié)B性能無顯著影響，前三個因素的交互作用對抗?jié)B性能的影響也不顯著；各因素對鐵尾礦砂混凝土抗?jié)B性的影響規(guī)律是：在試驗范圍內，鐵尾礦砂混凝土的抗?jié)B性隨水膠比以及粉煤灰摻量的增大而出現(xiàn)降低的趨勢，而在取代率影響下，出現(xiàn)先提高后降低的現(xiàn)象，當取代率為25%時，鐵尾礦砂混凝土的抗?jié)B性最好；軸向壓力對抗?jié)B性的影響趨勢與取代率相同，在荷載水平為0.4倍混凝土抗壓強度時，抗?jié)B壓力出現(xiàn)有壓狀態(tài)下的最大值，當荷載水平超過0.4后，隨著荷載的增加抗?jié)B性開始降低。課題的結論可以為鐵尾礦砂在混凝土中的應用提供必要的試驗數(shù)據。
[Abstract]:The application of iron tailings in concrete can not only solve the problems of environmental pollution and large amount of land occupied by iron tailings, but also solve the outstanding contradiction of the shortage of sand resources for construction. At present, the experimental research on iron tailings concrete is focused on its mechanical properties at home and abroad, but the research on impermeability is rare. This is a serious constraint to the application of iron tailings in hydraulic concrete and underground structure concrete. Therefore, it is very necessary to study the impermeability of iron tailings concrete. Taking the concrete made of iron tailings instead of natural sand and ordinary crushed stone as the object of study, the progressive compression method and permeability coefficient method are adopted. The impermeability of iron tailings concrete was studied by orthogonal test design, and the test results were analyzed by means of range analysis, variance analysis and regression analysis. The experimental results show that the water-binder ratio is the most important factor affecting the impermeability of iron tailings concrete, followed by the content of fly ash, and the influence of the replacement ratio of iron tailings on the impermeability is inferior to that of fly ash. However, the sand ratio has no significant effect on the impermeability, and the interaction of the first three factors has no significant effect on the impermeability of the iron tailings concrete, and the influence of each factor on the impermeability of the iron tailings concrete is as follows: in the range of test, The impermeability of iron-tailings concrete decreases with the increase of water-binder ratio and the content of fly ash, but under the influence of substitution rate, the impermeability of iron-tailings concrete is the best when the substitution ratio is 25. The influence trend of axial pressure on impermeability is the same as the substitution rate. When the load level is 0.4 times the compressive strength of concrete, the maximum value of impermeability appears in the state of pressure, and when the load level exceeds 0.4, With the increase of load, the impermeability begins to decrease. The conclusion of this paper can provide the necessary test data for the application of iron tailings in concrete.
【學位授予單位】：河北聯(lián)合大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TU528

【參考文獻】

相關期刊論文 前10條

1 易成,謝和平,孫華飛,高偉;混凝土抗?jié)B性能研究的現(xiàn)狀與進展[J];混凝土;2003年02期

2 邢鋒,冷發(fā)光,馮乃謙,馬冬花;長期持續(xù)荷載對素混凝土氯離子滲透性的影響[J];混凝土;2004年05期

3 陳立軍;孔令煒;王德君;丁銳;梁銳;;混凝土滲透性概念的細化及其測試方法[J];混凝土;2009年01期

4 黃世偉;李妍妍;程麟;嚴生;;用梅山鐵尾礦制備免燒免蒸磚[J];金屬礦山;2007年04期

5 陳肇元;高強混凝土與高性能混凝土(續(xù)1)[J];建筑技術;1997年10期

6 蒲含勇,張應紅;論我國礦產資源的綜合利用[J];礦產綜合利用;2001年04期

7 鄧初首;夏勇;;尾礦砂在大流動性混凝土中的應用研究[J];礦冶工程;2010年01期

8 許發(fā)松;;尾礦砂石在混凝土中的研究與應用[J];商品混凝土;2006年03期

9 吳長毅;;混凝土抗?jié)B試驗密封新技術[J];建材技術與應用;2008年06期

10 蔡基偉;封孝信;趙麗;王春梅;楊立榮;;鐵尾礦砂混凝土的泌水特性[J];武漢理工大學學報;2009年07期

本文編號：1626179